2-Pyrrolidinone, 4-(p-chlorophenyl)- (8CI); (±)-Baclofen Lactam; (RS)-4-Amino-3-(4-chlorophenyl)butyric Acid Lactam; 4-(4-Chlorophenyl)-2-pyrrolidone; 4-(4-Chlorophenyl)-2-pyrrolidinone; Baclofen Related Compound A (USP); Baclofen Impurity A (IP);4-(4-chlorophenyl)pyrrolidin-2-one